This is guidance for writing Remotion React Markup. If this is not relevant, load Remotion Best Practices instead.

Preserve user changes

Users may make edits in the code outside of the conversation.

If you detect a surprising change made in the meanwhile, don't overwrite it, assume it was intentional or ask for confirmation.

General rules

Drive animations using useCurrentFrame() and interpolate().
CSS transition or animation will not render correctly, they need to refactored.
Tailwind animation class will not render correctly, they need to be refactored.

Use Easing.bezier() and Easing.spring() to customize timing.

Structure your markup according to Remotion Interactivity Best Practices

import { useCurrentFrame, Easing, interpolate, Interactive } from "remotion";

export const FadeIn = () => {
  const frame = useCurrentFrame();

  return (
    <Interactive.Div
      name="Title"
      style={{
        opacity: interpolate(frame, [0, 2 * fps], [0, 1], {
          extrapolateRight: "clamp",
          extrapolateLeft: "clamp",
          easing: Easing.bezier(0.16, 1, 0.3, 1),
        }),
      }}
    >
      Hello World!
    </Interactive.Div>
  );
};

Keep the interpolate() call inline in the style prop. Use scale, translate, rotate CSS properties over transform.

// 👍 Inline editable keyframes and transform shorthands
style={{
  scale: interpolate(frame, [0, 100], [0, 1], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
    easing: Easing.spring({damping: 200}),
    output: 'perceptual-scale' // For `scale` animations, use "output: 'perceptual-scale'"
  }),
  translate: interpolate(frame, [0, 100], ["0px 0px", "100px 100px"], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
    easing: Easing.spring({damping: 200}),
  }),
  rotate: interpolate(frame, [0, 100], ["20deg", "90deg"], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
    easing: Easing.spring({damping: 200}),
  }),
}}

// 👎 Non-inline values and transform strings become harder to edit in Studio
const scale = interpolate(frame, [0, 100], [0, 1]);

style={{
  transform: `scale(${scale})`,
}}

Assets

Place assets in the public/ folder at your project root. Use staticFile() to reference files from the public/ folder.

Media components

Add video and audio using <Video> and <Audio> from @remotion/media.
Add images using the <CanvasImage> component. Add animated GIFs, APNG, WebP or AVIF images using <AnimatedImage>, use @remotion/gif if not using Chrome. Use staticFile() for files in public/ or pass a remote URL directly:

import { Audio, Video } from "@remotion/media";
import { staticFile, CanvasImage, AnimatedImage } from "remotion";

export const MyComposition = () => {
  return (
    <>
      <Video src={staticFile("video.mp4")} style={{ opacity: 0.5 }} />
      <Audio src={staticFile("audio.mp3")} />
      <CanvasImage
        src={staticFile("logo.png")}
        style={{ width: 100, height: 100 }}
      />
      <Video src="https://remotion.media/video.mp4" />
      <AnimatedImage src={staticFile('nyancat.gif')} />
    </>
  );
};

Example scene

import {
  AbsoluteFill,
  Easing,
  Interactive,
  interpolate,
  useCurrentFrame,
  useVideoConfig
} from "remotion";

export const Empty = () => {
  const {fps} = useVideoConfig();
  const frame = useCurrentFrame();

  return (
    <AbsoluteFill
      name="Scene"
      style={{
        display: 'flex',
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: 'white'
      }}
    >
      <Interactive.Div
        name="Title"
        style={{
          opacity: interpolate(frame, [1 * fps, 2 * fps], [0, 1], {
            extrapolateRight: "clamp",
            extrapolateLeft: "clamp",
            easing: Easing.bezier(0.16, 1, 0.3, 1),
          }),
          fontSize: 88
        }}
      >
        Title
      </Interactive.Div>
      <Interactive.Div
        name="Subtitle"
        style={{
          opacity: interpolate(frame, [2 * fps, 3 * fps, 8 * fps, 10 * fps], [0, 1, 1, 0], {
            extrapolateRight: "clamp",
            extrapolateLeft: "clamp",
            easing: [Easing.bezier(0.16, 1, 0.3, 1), Easing.linear, Easing.bezier(0.16, 1, 0.3, 1)],
          }),
          fontSize: 32
        }}
      >
        Subtitle
      </Interactive.Div>
    </AbsoluteFill>
  );
}

Delaying, trimming

Most components (<AbsoluteFill>, <Interactive.*> <Img>, <AnimatedImage>, <CanvasImage>, <HtmlInCanvas>, <Solid>, <Sequence> from remotion, <Video> and <Audio> from @remotion/media, <Gif>, and more) support the following props:

from

<Img from={1 * fps} {/* ... */}/>
<Video from={1 * fps} {/* ... */}/>
<Interactive.Div from={1 * fps} {/* ... */}/>

When the element starts appearing in the timelien.

durationInFrames

<Img durationInFrames={20 * fps} {/* ... */}/>
<Interactive.Div durationInFrames={20 * fps} {/* ... */}/>

For how long the layer plays in the timeline.
For media, pass the natural duration of the media: <Video durationInFrames={29.322 * fps}/>

trimBefore

Useful for components whose internal clock should start later:

// Trim away first 2 seconds of footage
<Video trimBefore={2 * fps} {/* ... */} />

// `useCurrenFrame()` for children starts at `10 * fps`
<Sequence trimBefore={10 * fps} {/* ... */} />

trimAfter

Ends the internal clock at a frame. Measured in the same clock as trimBefore, so the layer lasts (trimAfter - trimBefore) / playbackRate frames in the timeline unless durationInFrames is shorter:

// Play the footage from second 2 to second 5
<Video trimBefore={2 * fps} trimAfter={5 * fps} {/* ... */} />

// Children see frames `10 * fps` through `15 * fps - 1`
<Sequence trimBefore={10 * fps} trimAfter={15 * fps} {/* ... */} />

loop

Repeats the range between trimBefore and trimAfter. durationInFrames sets the total length. <Video> and <Audio> may omit trimAfter and loop the whole file; other layers need trimAfter because they have no intrinsic end:

<Video loop durationInFrames={20 * fps} {/* ... */} />
<Sequence trimAfter={2 * fps} durationInFrames={20 * fps} loop {/* ... */} />

<Img>, <CanvasImage>, <Solid> and shapes do not support loop because their output does not change over time.

Fallback

If a component does not support these props, wrap it in<Sequence> from remotion, which has them.

• layout="absolute-fill" makes the Sequence behave like AbsoluteFill
• layout="none" is "headless" mode, no wrapper element is used.

Maps

See Remotion Maps if wanting to include maps in the video.

Text highlights and annotations

See text-highlights.md for text highlights (highlight markers), circles, underlines, strike-throughs, crossed-off text, boxes.

Multi-scene videos

See multi-scene-video.md if planning to make a video with multiple subsequent scenes.

Connected compositions

When a scene or group of layers deserves its own editable timeline, follow connected-compositions.md. Prefer this structure for substantial scenes in a multi-scene video.

For a Studio request such as Pre-compose Ambient glow (src/BarChart.tsx:134), find the selected sequence markup at the given location. Make a connected composition, following connected-compositions.md: extract the markup into a named component, render one direct instance of it as the only child of a <Sequence>, <Series.Sequence>, or <TransitionSeries.Sequence>, and register that same component reference with a unique <Composition> in the root. If the selected node is already a sequence, keep its props and extract its children. The registration needs dimensions, fps, duration, and defaultProps equivalent to its parent use. A component extraction without a registered composition does not complete a pre-compose request.

The extracted component may return a fragment; do not add a DOM wrapper. Preserve sibling order, props, keys, conditional rendering, dimensions, appearance, and timing. Trace values used by the selected markup: move their derivations only when the same scope and lifecycle are preserved, otherwise pass them as props. In particular, moving useCurrentFrame() or useVideoConfig() across a sequence boundary can change its result; pass the parent value when needed. If the selection or a behavior-preserving connected composition is unclear, ask for clarification instead of guessing.

Voiceover

See voiceover.md for adding an AI-generated voiceover to Remotion compositions using ElevenLabs TTS.

Embedding Videos

See embedding-videos.md for advanced knowledge about embedding videos - trimming, volume, speed, looping, pitch.

Embedding Audio

See audio.md for advanced audio features like trimming, volume, speed, pitch.

Video editing

See video-editing.md for structuring editable video timelines in Remotion Studio.

Cropping

See cropping.md if needing to crop the visible rectangle of a component.

Transitions

See transitions.md for scene transition patterns.

Motion blur

When adding motion blur or a movement trail, read motion-blur.md for the preferred HTML-in-canvas approach, preview requirements, and alternatives.

Visual and pixel effects

When creating a visual effect, consider whether it is feasible using CSS and HTML, or whether a shader is needed.
Order or preference:

1. Regular HTML + CSS or other web techniques
2. An effect applied to the element directly (<Video>, <Img>), or by wrapping the content in <HtmlInCanvas>, which also accepts effects:

• A listed effect via effects.md
• A custom createEffect() via effects.md when no preset is available.

3D content

See ./3d.md for 3D content in Remotion using Three.js and React Three Fiber.

Sound effects

When needing to use sound effects, load the ./sfx.md file for more information.

Audio visualization

When needing to visualize audio (spectrum bars, waveforms, bass-reactive effects), load the ./audio-visualization.md file for more information.

Maps

For static maps, animated routes and markers, geographic explainers, Mapbox, MapLibre, MapTiler, GeoJSON, or 3D geographic flyovers, load Remotion Maps.

Captions

When dealing with captions or subtitles, load the Remotion Captions skill for more information.

Google Fonts

Is the recommended way to load fonts in Remotion. See google-fonts.md for how to load Google Fonts.

Local fonts

See local-fonts.md for how to load local fonts.

GIFs

See gifs.md for how to display GIFs synchronized with Remotion's timeline.

Advanced Images

See images.md for sizing and positioning images, dynamic image paths, and getting image dimensions.

Lottie animations

See lottie.md for embedding Lottie animations in Remotion.

Timing

See timing.md for more timing techniques for interpolate().

Parameterized videos

See parameters.md for making a composition parametrizable by adding a Zod schema.

Measuring DOM nodes

See measuring-dom-nodes.md for measuring DOM element dimensions in Remotion.

Measuring text

See measuring-text.md for measuring text dimensions, fitting text to containers, and checking overflow.

Using FFmpeg

For some video operations, such as trimming videos or detecting silence, FFmpeg should be used. Load the ./ffmpeg.md file for more information.

Silence detection

When needing to detect and trim silent segments from video or audio files, load the ./silence-detection.md file.

Dynamic duration, dimensions and data

See calculate-metadata.md for dynamically set composition duration, dimensions, and props.

Advanced compositions

See compositions.md for how to define stills, folders, default props and for how to nest compositions. For Studio navigation into a scene's own timeline, use connected compositions.

Advanced sequencing

See sequencing.md for more sequencing patterns - delay, trim, limit duration of items.

Install modules

Use npx remotion add to add new packages with the right version:

npx remotion add @remotion/media

This goes for @remotion/* packages, mediabunny, @mediabunny/*, zod, and @huggingface/transformers.

Visual checks

When a visual check is useful, open the Remotion Studio for an interactive preview.

You can also use Rendering to inspect one or several frames as images.